BPA处理香蕉中O_2和CO_2浓度的变化及其对乙烯生成和呼吸速度的影响

THE CHANGES OF O_2 AND CO_2 CONCENTRATION AND THEIR EFFECTS ON ETHYLENE PRODUCTION AND RESPIRATORY RATE IN BANANA TREATED WITH BPA

香蕉经BPA处理后48小时,果实内O_2浓度由18.7％降至3.7％,比对照同期(16.9％)降低78.01％,并可保持低O_2(低于5％)下48—72小时,果实中乙烯的生成明显被抑制,乙烯和呼吸高峰推迟13天出现,贮藏寿命比对照大大延长。在处理后48小时恢复果实中O_2的供应,乙烯的生成可恢复甚至超过对照水平;处理后96小时恢复O_2的供应,则乙烯的生成不能恢复到对照水平。表明降低果实内O_2的浓度,可能抑制了EFE的活性。

O_2 concentration in fruits is reduced from 18.7%to 3.7% in 48h after banana is teated with BPA, and reduced as much as 78.01% as compared with control fruits (CK) of the same time, and this lower O2 concentration is kept in 48-72h. The ethylene production of treated fruits is inhibited obviously. Both ethylene peak and respiratory climacteric are postponed for 13 days, their storage life is prolonged obviously as compared with CK. If O2 supply in fruits is renewed in 48h after the treatment, ethylene production will return to and even surpass CK level. If O2 supply in fruits is renewed in 96h after the treatment, ethylene production will not return to CK level. This indicates that O2 concentration in fruits is reduced, EFE activity is inhibited probobly.